Frame for spring seats



June 22, 1937. I M. BREUER FRAME FOR SPRING SEATS Filed Dec. 2, 1935 fir i Patented June 22, 1937 tJNlTED STA TENT 'E'EIQE 8 Claims.

The invention relates to chairs, spring seats, easy chairs, and so on and more particularly t the frame of such seats.

The known spring seats are provided with a spring underframe, mostly constructed from steel tubing, consisting of 'a'pair of front supports which at the bottom are continued as horizontal supporting bars, at the level of the seat are bent to form seat bars and backs and also into arms. 10 The actual supporting members of these spring frames are thus the front supports which by reason of the strain directed eccentrically thereto by the weight of theperson using the seat, are not only subjected to pressure but also to bending, and this to a considerable degree, as a result of which the under-frame as a whole must be constructed of strong highly resilient material so that these strains can be taken up without a permanent deformation and liability to breaking. The production of these spring seats is preferably carried out with very thick-walled steel tubes of considerable diameter.

It has also been suggested previously in order to enable weaker steel tubes to be used in connection with spring seats having a steel tube under-frame, to provide auxiliary supports which are rotatably secured, between the rear cross-bar of the actual seat and bottom supporting bars, at their ends about vertical pivots and hingedly connected together at the middle. This method of relieving the load from the front main supports of the spring under-frame, is, however, technically complicated by reason of the requirement forfree movement of eachof these supports about a vertical axis and particularly renders it necessary for the supporting points of these auxiliary supports to be located vertically above the supporting points of these auxiliary supports on the bottom bars so that the degree of relieving the 40 main supports by reason of the auxiliary supports cannot be influenced by a free selection of the supporting points relatively to the seat and supporting bars. Moreover this method of sup porting also can only be employed in connection 5 with spring under-frames formed of bent steel tubing, but not to wood frames, for example, which are not springy per se.

In order to provide spring auxiliary supports in spring under-frames for seats of all types for relieving the front supports, these supports, ac-

cording to the invention, being formed as spring 7 rear supports extending substantially in the lateral planes of the seats or parallel thereto, which at one end are united with the supporting bars of the under-frame at the bottom, and atthe support by these spring arcs does not only depend on the shaping of these spring arcs and their natural resiliency, but also on the position of their upper and lower, connecting points in the underframe.

In the drawing:

Fig. 1 is a perspective view of a chair frame made in accordance with the present invention,

Fig. 2 illustrates a modified construction of a side member of the chair frame, and the Figs. 3 and 4 show further modifications of a side member of the chair frame. In Fig. l is shown a frame for a chair consisting of two side members, each made of a flat bar of steel slit longitudinally to provide two parallel strips remaining united at one end. One of said strips is bent in such manner that it forms a horizontally and forwardly extending supporting bar l2v which rests upon the'floor, an upwardly extending leg H, a rearwardly and substantially horizontally extending seat bar l4 and an upwardly extending back bar l5. The other strip serves as a resilient rear support I! and is curved forwardly, upwardly and rearwardly and its free end is located adjacent the seat bar it and is rigidly connected to the latter by a member 20. This member 25 extends across the adjacent parallel parts of said strips and maybe extended and bent upwardly. A bar 2i serving as an arm rest is secured to the upper and laterally inwardly bent portion'22 of the member 2i The two side membersare preferably connected together by a cross barv is, J I

Fig. 2 illustratesa somewhat modified construction of a side member adapted to be used for"- Inthis case the. strip forming the resilient rear support H is making the-frame of the chair.

extended rearwardly and terminates in the up- Wardly directed back bar 55, while the other strip forming the front support 52, the leg H and the seat bar it terminates at the point where the member it is attached.

The Figs. 3 and 4 illustrate further modifications of the side member. It will be noted that the seat bar it is not connected by a separate member to the horizontally extending portion ll of the resilient rear supporting strip ll as both;

. of these strip portions M and El respectively are adapted to be connected to the seat and thus become in effect rigidly connected with each other.

jwardly and then bent upwardly and horizontally forward to form an arm rest l8. a g Having now particularly described and ascertained the nature of my said invention and "in In Fig. 3, the seat bar i=3 may be extended rearwhat manner the same is to be performed, I declare that what lclaim is:-

1. A frame for a chair, comprising a pair of 60 I horizontally forwardly and adapted of metal slit longitudinally to provide two strips remaining united at one end, one of said strips extending horizontally forwardly and adapted to rest upon the floor, then extending upwardly to form a front leg and then extending substantially horizontally backward to form a support for a seat, the other one of said strips being curved upwardly, forwardly and rearwardly to form a resilient rear support for a seat, one of said strips being continued beyondits seat supporting portion to extend upwardly and thus form a support on which a back rest of the chair is adapted to be secured.

2. A frame for a chair, comprising a pair of side members, means connecting the same together, each side member being formed of a bar of metal slit longitudinally to provide two strips remaining united at one end, one of said strips extending horizontally forwardly and adapted to rest upon the floor, then extending upwardly to supporting portion to extend upwardly and thus form a support on which a back rest of the chair isadapted to be secured.

' 3; A frame for a chair, comprising axpair of side members, means connecting the same together, each side member being formedof a bar of metal slit longitudinally to provide twostrips j remaining united at one end, one of said strips being curved upwardly, forwardly and rearwardly to form a resilient rear support for a seat,rthe other one of said strips extending horizontally forwardly and adapted to rest upon the floor, then extending upwardly to form a frontleg and then extending substantially horizontally backward to form a support for a seat and to lie parallel to,

and adjacent to the seat supportingportion of said first mentioned strip, and means for rigidly connecting the adjacent parallel parts of the seat supporting-portions of said strips with eachother, said means comprising amember extending acrossk. I 7 said strips being continued rearwardly beyond its said adjacent parallel parts and extending upwardly and being provided with means forming contirmed beyond its seat supporting portion to extend upwardly and thus form a support on rest of the chair is adapted to be of metal slit longitudinally to provide two strips remaining united at one end, one of said strips ','to rest upon the floor, then extending upwardly :to form a front legand then extending substantially horizontally backward to forina support for a seat, the other one of 'saidfstrips being dcurved upwardly, forwardly and rearwardly to. form a resilient rear support fora seat, one of; said strips being continued beyond its seat sup- "porting portion to extend upwardly and thus form a support on which a back rest of the chair is adapted to be secured, the other one of said strips being also continued beyondits. seat sup- "in rest of thechair, one of said strips being I porting portion and being bent upwardly and then forwardly toform an arm rest.

5. A side member for a chair frame, comprising a bar of metal slit longitudinally to provide two, parallel strips remaining united at one end, one of said strips extending horizontally forwardly and adapted to rest upon the floor, then extending upwardly to form a front leg and then extending substantially horizontally backward to form a support for a seat, the other one of said strips being curved forwardly, upwardly and rearwardly to form a resilient rear support for a seat, one of said strips being continued beyond its seat supporting portion to extendupwardly and thus form a support on which a backrest of a chair is adapted to be secured.

6. A side member for a chair frame, comprising a bar of metal slit longitudinally to provide two parallel strips remaining united atone end,

one of said strips extending horizontally forwardiy and adapted to rest upon thefloor, then extending upwardly to form a front leg and then extending substantially horizontally backward to form a support for a seat, the other one of said strips being curved'forwardly, upwardly and rearwardly to form a resilient rear support for a seat, and means for rigidly connecting the adjacent parts of the seat supporting portions of said strips with each other, one of said strips being continued beyond its seat supporting portion to extend upwardly and thus form a support on which 7 aback rest of a chair is adapted to be secured.

7. A side member for a chair frame, comprising a bar of metal slit longitudinally to provide twoparallel strips remaining united at one end,,

one of said strips extending horizontally forwardly and adapted to rest upon the floor, thenextending upwardly to form a front leg and then extending substantially horizontally backward to form a support for a seat, the other one of said:

strips being curved forwardly,,upwardly and rear.-

means forming an armrest ofthe chair, one of seat supporting-portion to extend upwardly and.

thus form a; support on which a back rest of a chair is adapted to be secured.

8. A side memberfor a chair frame, comprising a bar of metal slit longitudinally "to provide two parallel strips remaining united atone end, one, of said strips extending horizontally'iorwardly and adapted to rest upon the floor, then extending upwardly to for'ma front leg and then extending substantially horizontally backward to form a support for a seat, the other one. of said strips being curved forwardly, upwardlyand rearwardly to form a resilient rear support for a-seat,

one of said strips being continued rearwardly beyond its seat supporting portion to extendupwardly and thus form a'support on which a back rest of a chair is adapted to be secured, the

other one of said strips being also'co'n'ti'nued rearwardly beyond its seat supporting portion and being bent upwardly and then forwardly to form an arm rest. Y

.MARCEL BREUER'. 

